关于 365Lab加水印About 365Lab Watermark
一个把「证件与图片处理」这件事做完的免费小站：加水印、打码一站解决，不用装软件，也不用上传任何文件。A free little site that finishes the job of handling documents and photos: watermark and mask - one stop, no install, no uploads.
站点信息Site details
- 名称：365Lab加水印Name: 365Lab Watermark
- 地址：watermark.365lab.topURL: watermark.365lab.top
- 官网：www.365lab.topWebsite: www.365lab.top
- 费用：免费，无次数与尺寸限制（受设备内存约束）Cost: free, no quota (bounded by your device memory)
功能一览What it does
- 文字 / Logo / 手写签名 / 日期 / 二维码水印，支持平铺、旋转、九宫格位置、描边阴影Text, logo, signature, date and QR watermarks with tiling, rotation, nine-grid placement, outline and shadow
- 多图批量处理与 ZIP 打包Batch processing with ZIP packaging
- 涂抹 / 框选马赛克、模糊、纯色遮盖，可擦除可撤销Painted or rectangular mosaic, blur and solid cover, erasable and undoable
- 导出 PNG / JPG / WebP / PDF 与浏览器在线打印PNG / JPG / WebP / PDF export plus in-browser printing
技术说明Under the hood
零依赖Zero dependencies
没有前端框架、没有 CDN 引用、没有外链字体。水印、马赛克、二维码、PDF、ZIP 全部由自研脚本在 Canvas 上算出来，断网可用。No framework, no CDN, no web fonts. Watermark, mosaic, QR, PDF and ZIP are all produced by in-house scripts on Canvas - it works offline.
隐私优先Privacy first
图片只在内存处理，不落盘、不上传；关闭页面即刻释放，页面切到后台（切换标签页 / 最小化）持续 1 分钟自动清除，30 分钟无操作同样清除，另有「彻底清除」按钮。Images stay in memory, never uploaded or written to disk; closing the page frees them instantly, the page hidden in the background (tab switch / minimise) auto-clears after 1 minute, 30 minutes of inactivity clears too, plus a manual erase button.
尺寸精确Accurate sizes
裁剪与导出按毫米尺寸计算，DPI 可调（150–600），PDF 由自研写入器按磅值精确输出。Cropping and export use millimetre sizes with 150-600 DPI, and the in-house PDF writer emits exact point sizes.
问题反馈 · 意见建议Feedback & suggestions
随时向我们反馈Reach out any time
使用中遇到任何问题、想提建议或意见，欢迎随时联系。点击下方邮箱地址即可自动复制，再粘贴到你的邮件客户端发送即可。Found a bug, have a suggestion or just want to say hello? Click the email address below to copy it, then paste it into your mail client.